basesink: Clamp the base time correctly in position reporting

When clamping the base time, correctly use 'now', instead of
'-now' - the intent is to prevent 'now-base' ever being
negative, which would cause a position report outside the segment.

Fixes: #602419

diff --git a/libs/gst/base/gstbasesink.c b/libs/gst/base/gstbasesink.c
index e9c2ca7..b27e90d 100644 (file)
--- a/libs/gst/base/gstbasesink.c
+++ b/libs/gst/base/gstbasesink.c
@@ -4386,7 +4386,7 @@ gst_base_sink_get_position (GstBaseSink * basesink, GstFormat format,
   base += accum;
   base += latency;
   if (GST_CLOCK_DIFF (base, now) < 0)
-    base = -now;
+    base = now;
 
   /* for negative rates we need to count back from the segment
    * duration. */